High purity alumina ceramic crucible high temperature porcelain

Overview of Alumina Porcelain Crucible

An alumina crucible is a high-temperature, heat-resistant container made largely from alumina (light weight aluminum oxide, Al ₂ O ₃). Alumina is understood for its outstanding thermal stability, resistance to chain reactions, and capacity to endure extreme temperature levels, making it an optimal material for a variety of commercial and lab applications. Alumina crucibles are generally made use of in processes that require high-temperature home heating, such as metal melting, product testing, and chemical reactions.

Alumina crucibles can be found in numerous sizes and shapes, depending upon the specific application. They are normally made use of in industries such as metallurgy, porcelains, glass manufacturing, and clinical research.

Specifications Table of Aluminum Oxide Ceramic Refractory Bricks

Property	Specification Value
Al₂O₃ Content (%)	>= 90%
Bulk Density (g/cm³)	2.7 – 3.6
Cold Crushing Strength (MPa)	>= 80
Apparent Porosity (%)	<= 20
Reheat Linear Change (%)	+0.1 to -0.5
Thermal Conductivity (W/m·K)	~3.0 at 1000°C

Features of Alumina Crucible

• High Temperature Resistance: Alumina crucibles can endure temperature levels as much as 1700 ° C( 3092 ° F), making them ideal for a wide range of high-heat applications.
• Chemical Resistance: Alumina is very resistant to many acids, antacid, and various other destructive materials, ensuring the crucible does not react with the materials being processed.
• Thermal Shock Resistance: Alumina crucibles can take care of fast changes in temperature level without splitting or breaking, which is important when working with extreme warmth.
• Electric Insulation: Alumina has excellent electrical shielding buildings, which is important in particular electric and electronic applications.
• Toughness: The high mechanical strength of alumina makes sure that the crucible is durable and can endure long term usage without considerable degradation.
• Non-reactive Surface area: Alumina’s inert surface avoids contamination of the materials being heated, making it excellent for high-purity procedures.
• Lightweight: Regardless of their toughness, alumina crucibles are reasonably lightweight, which makes managing easier.

Manufacturing Process of Alumina Ceramic Crucible

Basic Material Option:

The primary product used is light weight aluminum oxide (Al ₂ O ₃), which can be sourced from calcined alumina or other polished kinds. The pureness level of alumina straight affects the top quality and performance of the final product.

Formulation:

Relying on the preferred properties of the crucible, extra materials such as binders, plasticizers, and in some cases other ceramic powders may be added to the alumina powder. These additives help enhance the workability of the combination throughout creating and add to the stamina and longevity of the completed product.

Mixing:

The raw products are completely mixed to ensure an uniform mix. This step is vital for accomplishing constant high quality throughout the set.

Creating:

There are numerous methods to create the crucible, consisting of pushing, slip spreading, and shot molding.

Pushing: Dry powder is placed into a mold and mildew and pressed under high pressure to form the form.

Drying out:

Slip Casting: A fluid suspension of the ceramic product (slip) is poured into a porous mold and mildew. The water is soaked up by the mold, leaving a strong layer of ceramic material.

Injection Molding: The ceramic product is combined with a polycarbonate binder and infused right into a mold and mildew under warmth and stress.

After developing, the green (unfired) crucible is dried to get rid of any recurring dampness. Drying can be done making use of air drying, oven drying out, or microwave drying techniques, depending upon the technique used for creating.

Firing (Sintering):.

As soon as dried out, the crucibles go through shooting at extremely heats (normally in between 1400 ° C and 1800 ° C). Throughout this phase, the ceramic bits fuse together, boosting density and mechanical toughness. The temperature and period of firing depend on the particular formulation and planned use the crucible.

Finishing:.

After firing, some crucibles may need extra machining or grinding to attain specific measurements or smooth surface areas. Surface area therapies might likewise be related to boost specific residential properties like deterioration resistance.

Quality assurance:.

Lastly, each crucible is inspected for defects such as cracks or blemishes that might compromise its integrity. Checking might include aesthetic inspection, dimensional checks, and occasionally non-destructive screening methods.

Packaging:.

Appropriate product packaging is vital to protect against damage throughout transportation and storage. Product packaging materials must protect against physical effects and environmental elements that could break down the crucible’s quality.

Applications of Alumina Crucible.

• Steel Melting: Alumina crucibles are typically utilized in the melting of metals, specifically those with high melting points, such as gold, silver, and certain alloys. The crucible’s capability to stand up to heats without responding with the steels makes it optimal for these processes.
• Lab Research: In clinical labs, alumina crucibles are utilized for sample heating, sintering, and performing chemical reactions at elevated temperatures. They are often utilized in product scientific research, chemistry, and physics research study.
• Glass Production: Alumina crucibles are made use of in the production of glass and ceramics because of their high warm resistance and capability to hold up against liquified materials without degradation.
• Casting and Foundry Work: In foundries, alumina crucibles are utilized to melt metals for casting processes, where their thermal residential or commercial properties make sure precise temperature control during steel pouring.
• Ceramic Shooting: In porcelains, alumina crucibles are made use of in kiln firing processes, where they support the high-temperature home heating needed for glazing or sintering porcelains.
• Chemical Handling: In the chemical industry, alumina crucibles can be used in numerous procedures, including the production of catalysts and other high-temperature responses.

Company Profile

NANOTRUN(www.rboschco.com) is a trusted global chemical material supplier & manufacturer with over 12-year-experience in providing super high-quality chemicals and nanomaterials, including boride powder, nitride powder, graphite powder, sulfide powder, 3D printing powder, etc.

The company has a professional technical department and Quality Supervision Department, a well-equipped laboratory, and equipped with advanced testing equipment and after-sales customer service center.

If you are looking for high-quality alumina ceramic crucible, please feel free to contact us or click on the needed products to send an inquiry. 

Payment Term

L/C, T/T, Western Union, Paypal, Credit Card etc.

Shipment Term

By sea, by air, by express, as customers request.

FAQs concerning Alumina Crucible

How do you clean an alumina crucible?
To cleanse an alumina crucible, it’s important to enable it to cool totally. You can cleanse it with a soft brush to remove any type of deposit. For persistent discolorations, a moderate unpleasant or cleaning solution may be used. Stay clear of making use of harsh chemicals that can damage the crucible.

What is the maximum temperature an alumina crucible can hold up against?
Alumina crucibles can usually endure temperature levels up to 1700 ° C (3092 ° F), though the specific temperature level limit might vary relying on the specific quality and high quality of the alumina used.

Can alumina crucibles be used for thawing all steels?
While alumina crucibles are optimal for thawing numerous steels, specifically non-ferrous metals like gold, silver, and copper, they may not be suitable for some responsive metals like salt or lithium, which can react with alumina at high temperatures.

The length of time do alumina crucibles last?
The life-span of an alumina crucible depends upon its use. In high-temperature and high-stress atmospheres, it can last for several uses prior to indicators of wear or degradation show up. Appropriate handling and care can extend its life considerably.

Are alumina crucibles risk-free to utilize in ovens or heating systems?
Yes, alumina crucibles are risk-free to utilize in commercial stoves, furnaces, or lab kilns that get to heats. They are made to endure thermal shock and resist destruction at high heat.

Can alumina crucibles be utilized in a microwave heater?
Alumina crucibles are normally not advised for usage in microwave furnaces unless they are specifically made for that objective, as the microwave home heating procedure can impact their framework. Constantly confirm compatibility with your equipment.

Do alumina crucibles call for any type of special storage?
Alumina crucibles ought to be kept in a completely dry, tidy atmosphere to prevent contamination. They ought to be kept away from mechanical stress and anxiety or impact, as they are brittle and can crack under pressure.